2121012012004 has 12 divisors (see below), whose sum is σ = 3711781551744. Its totient is φ = 1060502997224.

The previous prime is 2121012011969. The next prime is 2121012012011. The reversal of 2121012012004 is 4002102101212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1784289 + ... + 2725015.

It is an arithmetic number, because the mean of its divisors is an integer number (309315129312).

Almost surely, 2^{2121012012004} is an apocalyptic number.

It is an amenable number.

2121012012004 is a deficient number, since it is larger than the sum of its proper divisors (1590769539740).

2121012012004 is a wasteful number, since it uses less digits than its factorization.

2121012012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504394 (or 1504392 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121012012004 its reverse (4002102101212), we get a palindrome (6123114113216).

The spelling of 2121012012004 in words is "two trillion, one hundred twenty-one billion, twelve million, twelve thousand, four".